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how do proportional symbols appear in the legend?

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#1
hocgis

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I am using ArcMap to build a thematic map. (Layer Properties - Symbology - Proportional symbols)
But I don't know how arcmap calculate the size of symbol in the lengend in TOC.
Can VBA (with arcObject) customize the way the legend appear?

#2
Bryan Krouse

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I am using ArcMap to build a thematic map. (Layer Properties - Symbology - Proportional symbols)
But I don't know how arcmap calculate the size of symbol in the lengend in TOC.
Can VBA (with arcObject) customize the way the legend appear?


This might help
http://forums.esri.c...p...30&t=213906

Bryan

#3
hocgis

hocgis

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Thank you for your link.

i found that the size in points is proportional to the square root of the data values
Normal case:
Pj = (Valj/ValMin)^0.5 * Pmin

in case, i want to change the square root to another functions. Ex: log10, cube root...
Using ArcObject can do this?

I'm in a hurry.
Many thanks!




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